Patient: Doctor ,I am very nervous. You know, this is my first dental surgery.
Young dentist: Don't worry, it's my first dental surgery too.

Dentist: There goes the only woman I ever loved.
Assistant: Why don't you marry her?
Dentist: I can't afford to. She's my best patient.

Patient: Doctor, I have yellow teeth, what do I do?
Doctor: wear a brown tie!